LKSC
Established
IIRC, any film that is DX-coded at 1600 will engage the "Natura" mode on the Natura cameras - flash is automatically turned off and film is given about 2 stops overexposure, as raid says, but lowest shutter speed in that mode is limited to 1/45s. I recall some posts in Japanese forums about using DX labels/ sharpie to trick the camera to do this. In normal usage, lowest shutter speed is 1 second.
When I shoot Natura 1600 in an M7, an ISO of 1000 works best for me.
When I shoot Natura 1600 in an M7, an ISO of 1000 works best for me.